“Java任务:图书信息检索”的版本间的差异
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<nowiki>package main; | <nowiki>package main; | ||
− | import java.awt. | + | import java.awt.*; |
− | + | ||
− | + | import javax.swing.*; | |
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− | |||
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− | import javax.swing. | ||
import javax.swing.table.DefaultTableModel; | import javax.swing.table.DefaultTableModel; | ||
− | |||
− | /*实训:Java任务:图书信息检索 | + | |
+ | |||
+ | /*实训:Java任务:图书信息检索 (代码编程版) */ | ||
public class BookListForm { | public class BookListForm { | ||
− | private JFrame frame; | + | private JFrame frame; |
− | private JTextField | + | private JLabel lblName; |
− | private JTable | + | private JLabel lblCity; |
+ | |||
+ | private JTextField txtBookName; | ||
+ | private JLabel lblCategory; | ||
+ | private JTable tblBook; | ||
/** | /** | ||
* 构造函数 | * 构造函数 | ||
第225行: | 第220行: | ||
frame = new JFrame(); | frame = new JFrame(); | ||
− | frame.setResizable( | + | frame.setResizable(true); |
− | frame. | + | //frame.setLayout(null); |
+ | frame.setLayout(null); | ||
− | JPanel panel1 = new JPanel( | + | //上半部分 |
− | + | JPanel panel1=new JPanel(); | |
− | |||
panel1.setLayout(null); | panel1.setLayout(null); | ||
+ | panel1.setBounds(0, 0, 550, 45); | ||
− | + | lblName = new JLabel("您好"); | |
− | lblName.setBounds(10, 10, | + | lblName.setBounds(10, 10, 131, 15); |
panel1.add(lblName); | panel1.add(lblName); | ||
− | + | lblCity = new JLabel("来自于:"); | |
− | lblCity.setBounds( | + | lblCity.setBounds(271, 10, 90, 15); |
panel1.add(lblCity); | panel1.add(lblCity); | ||
JSeparator separator = new JSeparator(); | JSeparator separator = new JSeparator(); | ||
− | separator.setBounds( | + | separator.setBounds(10, 35, 550, 10); |
panel1.add(separator); | panel1.add(separator); | ||
− | + | frame.getContentPane().add(panel1); | |
− | + | /* | |
− | + | String[] names = { "姓名", "语文", "数学", "总分", "作弊" }; | |
− | + | Object[][] scores = { { "张三", new Integer(66), new Integer(32), new Integer(98), new Boolean(false) }, | |
+ | { "李四", new Integer(82), new Integer(69), new Integer(128), new Boolean(true) }, }; | ||
+ | JTable table=new JTable(scores,names);//创建表格对象 | ||
− | + | JScrollPane scrollPane = new JScrollPane(table);//将表格添加到(滚动)面板中 | |
− | + | table.setFillsViewportHeight(true); | |
− | + | frame.add(scrollPane,BorderLayout.CENTER); | |
− | + | */ | |
− | |||
− | |||
− | |||
− | + | JPanel panel2=new JPanel(); | |
− | + | panel2.setLayout(null); | |
− | panel2. | + | panel2.setBounds(0, 45, 550, 20); |
− | + | //书籍名的 标签 | |
− | + | JLabel lblBookName = new JLabel("书籍名:"); | |
− | + | lblBookName.setFont(new Font("微软雅黑", Font.PLAIN, 14)); | |
− | + | lblBookName.setBounds(10, 2, 50, 20); | |
− | panel2.add( | + | panel2.add(lblBookName); |
+ | //输入书籍名的文本框 | ||
+ | txtBookName = new JTextField(); | ||
+ | txtBookName.setFont(new Font("微软雅黑", Font.PLAIN, 14)); | ||
+ | txtBookName.setBounds(65, 2, 130, 20); | ||
+ | panel2.add(txtBookName); | ||
+ | txtBookName.setColumns(10); | ||
+ | |||
+ | //分类的标签 | ||
+ | JLabel lblCategory = new JLabel("分类:"); | ||
+ | lblCategory.setFont(new Font("微软雅黑", Font.PLAIN, 14)); | ||
+ | lblCategory.setBounds(225, 2, 65, 20); | ||
+ | panel2.add(lblCategory); | ||
+ | |||
+ | //选择分类的复选框 | ||
+ | JComboBox cboCategory= new JComboBox(); | ||
+ | cboCategory.setModel(new DefaultComboBoxModel(new String[] {"- 请选择 -", "工具类 > 软件编程", "小说类 > 历史"})); | ||
+ | cboCategory.setFont(new Font("微软雅黑", Font.PLAIN, 14)); | ||
+ | cboCategory.setBounds(260, 2, 145, 20); | ||
+ | panel2.add(cboCategory); | ||
+ | JButton btnQuery = new JButton("查询"); | ||
+ | btnQuery.setBounds(441, 2, 78, 20); | ||
+ | panel2.add(btnQuery); | ||
− | + | frame.getContentPane().add(panel2); | |
− | |||
− | |||
JScrollPane scrollPane = new JScrollPane(); | JScrollPane scrollPane = new JScrollPane(); | ||
− | scrollPane.setBounds(10, | + | scrollPane.setBounds(10, 90, 550, 265); |
frame.getContentPane().add(scrollPane); | frame.getContentPane().add(scrollPane); | ||
− | + | //tblBook = new JTable(); | |
− | + | String[] names = { "编号","商品名称", "价格", "数量", "标签" }; | |
− | + | Object[][] scores = { { "01", "think in java", new Float(50.0f), new Integer(50), "软件编程" }, | |
− | + | { "03", "think in java", new Float(50.0f), new Integer(40), "软件编程"}, | |
− | + | {"03", "射雕英雄传", new Float(30.0f), new Integer(30), "文学经典" }, | |
− | + | }; | |
− | + | ||
− | + | ||
− | + | JTable tblBook=new JTable(scores,names);//创建表格对象 | |
− | + | scrollPane.setViewportView(tblBook); | |
− | |||
− | |||
− | scrollPane.setViewportView( | ||
− | JPanel panel3 = new JPanel( | + | JPanel panel3=new JPanel(); |
− | |||
− | |||
panel3.setLayout(null); | panel3.setLayout(null); | ||
+ | panel3.setBounds(0, 355, 550, 45); | ||
+ | |||
+ | JLabel lblCart = new JLabel("购物车商品数:"); | ||
+ | lblCart.setBounds(10, 10, 91, 15); | ||
+ | panel3.add(lblCart); | ||
+ | |||
+ | |||
+ | JLabel lblQuantity = new JLabel("0件"); | ||
+ | lblQuantity.setBounds(104, 10, 54, 15); | ||
+ | panel3.add(lblQuantity); | ||
+ | |||
+ | |||
+ | JLabel lblCartDetail = new JLabel("查看详情"); | ||
+ | lblCartDetail.setForeground(Color.BLUE); | ||
+ | lblCartDetail.setBounds(179, 10, 54, 15); | ||
+ | panel3.add(lblCartDetail); | ||
− | + | JButton btnBuy = new JButton("购买"); | |
− | + | btnBuy.setBounds(441, 10, 78, 23); | |
− | panel3.add( | + | panel3.add(btnBuy); |
+ | frame.getContentPane().add(panel3); | ||
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frame.setTitle("电商购物平台-商品查询页面"); | frame.setTitle("电商购物平台-商品查询页面"); | ||
− | frame.setBounds(100, 100, | + | frame.setBounds(100, 100, 550, 450); |
− | |||
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); | frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); | ||
− | |||
frame.setVisible(true); | frame.setVisible(true); | ||
setCenter(frame); | setCenter(frame); | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
第343行: | 第369行: | ||
} | } | ||
+ | |||
+ | |||
} | } | ||
</nowiki> | </nowiki> | ||
返回 [[Java程序设计]] | 返回 [[Java程序设计]] |
2018年5月31日 (四) 01:29的版本
目录
任务描述
任务描述:图书信息检索
实现商品信息检索,如图9-1所示。
图 1商品信息检索
任务实现
初始代码
第一步:启动Eclipse,导入Java Project,工程名为Project0901。
package main; import java.awt.Dimension; import java.awt.Toolkit; import javax.swing.JFrame; /*实训:Java任务:图书信息检索*/ public class BookListForm { private JFrame frame; /** * 构造函数 */ public BookListForm() { initialize(); } /** * 窗体初始化 */ private void initialize() { frame = new JFrame(); frame.setResizable(false); frame.getContentPane().setLayout(null); frame.setTitle("电商购物平台-商品查询页面"); frame.setBounds(100, 100, 434, 430); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); setCenter(frame); } /** * 窗体自动居中 * * @param window */ private void setCenter(JFrame window) { Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); int width = window.getWidth(); int height = window.getHeight(); window.setBounds((d.width-width)/2, (d.height-height)/2, width, height); } public JFrame getFrame() { return frame; } public void setFrame(JFrame frame) { this.frame = frame; } public static void main(String[] args) { BookListForm bookForm = new BookListForm(); } }
布局面板
第二步:完善商品信息检索界面。
1. 在BookListForm类上单击右键,选择 Open With WindowBuilder Editor,如图2所示
图 2 打开菜单
在类编写窗口的底部选择【Design】标签。
图 3
向面板中添加元素
2.按照下图,把对应控件拖入窗体到指定位置,完成商品检索区域的构建,并设置各个控件的【Variable】属性:
图 4 组件设置
分类下拉框的设置
- 选中分类组合框,在左侧的Properties窗口中找到Model这栏,如图:
图 5 组合框设置
- 点击上图的“…”添加如下图所示的三个分类:
图 6 组合框设置
表格的创建
按照下图,完成商品显示区域的构建:
图 1-8
- 把JScrollPane拖到界面中,并拉伸成上图大小。
- 把商品列表JTable嵌到JScrollPane:必须要把JTable控件拖入JScrollPane的Viewport区域中才能显示,拖入的区域如下图中的黄色区域所示:
图 7 JScollPane布局
- 设置表头标题:
点击左侧控件列表中的JTable控件。
图 1-10
在属性列表中找到【model】,点击【…】打开表格编辑框:
图 8 表格编辑对话框
点击【Columns】区域的【Insert】插入一列, 在底部的列属性区域中设置【Title】为:书籍分类,设置列宽【Pref.width】为:164
按照以上步骤,依次添加如下表头信息:
列名:库存,列宽:70 列名:书籍作者,列宽:70 列名:书籍名称,列宽:150 列名:书籍编号,列宽:70
下部购买区域的创建
5. 按照下图,完成商品购买区域的构建:
图 9 商品购买区域
定义显示书籍数据的函数
private void showBooks(String name,int category) { BookDao dao=new BookDaoTesting(); List<Book> books=dao.queryBook(name, category); //在表格中显示数据 DefaultTableModel dt=(DefaultTableModel) tblBook.getModel(); dt.setRowCount(0); //判断是否查询到了满足条件的书籍信息 if(books==null||books.size()==0) { JOptionPane.showMessageDialog(frame, "没有满足条件的书籍信息","警告信息",JOptionPane.WARNING_MESSAGE); return; } for(int i=0;i<books.size();i++) { Book book=books.get(i); dt.insertRow(i, new Object[] { book.getBid(),book.getName(),book.getAuthor(),book.getNumber(), book.getCategory().toString() }); } }
为查询按钮添加事件处理程序
btnQuery.addActionListener(e->{ String name=txtBookName.getText(); int category=cboCategory.getSelectedIndex(); //显示书籍 showBooks(name,category); });
设置初始化窗口时,加载所有数据
showBooks(null,0);
程序代码
package main; import java.awt.*; import javax.swing.*; import javax.swing.table.DefaultTableModel; /*实训:Java任务:图书信息检索 (代码编程版) */ public class BookListForm { private JFrame frame; private JLabel lblName; private JLabel lblCity; private JTextField txtBookName; private JLabel lblCategory; private JTable tblBook; /** * 构造函数 */ public BookListForm() { initialize(); } /** * 窗体初始化 */ private void initialize() { frame = new JFrame(); frame.setResizable(true); //frame.setLayout(null); frame.setLayout(null); //上半部分 JPanel panel1=new JPanel(); panel1.setLayout(null); panel1.setBounds(0, 0, 550, 45); lblName = new JLabel("您好"); lblName.setBounds(10, 10, 131, 15); panel1.add(lblName); lblCity = new JLabel("来自于:"); lblCity.setBounds(271, 10, 90, 15); panel1.add(lblCity); JSeparator separator = new JSeparator(); separator.setBounds(10, 35, 550, 10); panel1.add(separator); frame.getContentPane().add(panel1); /* String[] names = { "姓名", "语文", "数学", "总分", "作弊" }; Object[][] scores = { { "张三", new Integer(66), new Integer(32), new Integer(98), new Boolean(false) }, { "李四", new Integer(82), new Integer(69), new Integer(128), new Boolean(true) }, }; JTable table=new JTable(scores,names);//创建表格对象 JScrollPane scrollPane = new JScrollPane(table);//将表格添加到(滚动)面板中 table.setFillsViewportHeight(true); frame.add(scrollPane,BorderLayout.CENTER); */ JPanel panel2=new JPanel(); panel2.setLayout(null); panel2.setBounds(0, 45, 550, 20); //书籍名的 标签 JLabel lblBookName = new JLabel("书籍名:"); lblBookName.setFont(new Font("微软雅黑", Font.PLAIN, 14)); lblBookName.setBounds(10, 2, 50, 20); panel2.add(lblBookName); //输入书籍名的文本框 txtBookName = new JTextField(); txtBookName.setFont(new Font("微软雅黑", Font.PLAIN, 14)); txtBookName.setBounds(65, 2, 130, 20); panel2.add(txtBookName); txtBookName.setColumns(10); //分类的标签 JLabel lblCategory = new JLabel("分类:"); lblCategory.setFont(new Font("微软雅黑", Font.PLAIN, 14)); lblCategory.setBounds(225, 2, 65, 20); panel2.add(lblCategory); //选择分类的复选框 JComboBox cboCategory= new JComboBox(); cboCategory.setModel(new DefaultComboBoxModel(new String[] {"- 请选择 -", "工具类 > 软件编程", "小说类 > 历史"})); cboCategory.setFont(new Font("微软雅黑", Font.PLAIN, 14)); cboCategory.setBounds(260, 2, 145, 20); panel2.add(cboCategory); JButton btnQuery = new JButton("查询"); btnQuery.setBounds(441, 2, 78, 20); panel2.add(btnQuery); frame.getContentPane().add(panel2); JScrollPane scrollPane = new JScrollPane(); scrollPane.setBounds(10, 90, 550, 265); frame.getContentPane().add(scrollPane); //tblBook = new JTable(); String[] names = { "编号","商品名称", "价格", "数量", "标签" }; Object[][] scores = { { "01", "think in java", new Float(50.0f), new Integer(50), "软件编程" }, { "03", "think in java", new Float(50.0f), new Integer(40), "软件编程"}, {"03", "射雕英雄传", new Float(30.0f), new Integer(30), "文学经典" }, }; JTable tblBook=new JTable(scores,names);//创建表格对象 scrollPane.setViewportView(tblBook); JPanel panel3=new JPanel(); panel3.setLayout(null); panel3.setBounds(0, 355, 550, 45); JLabel lblCart = new JLabel("购物车商品数:"); lblCart.setBounds(10, 10, 91, 15); panel3.add(lblCart); JLabel lblQuantity = new JLabel("0件"); lblQuantity.setBounds(104, 10, 54, 15); panel3.add(lblQuantity); JLabel lblCartDetail = new JLabel("查看详情"); lblCartDetail.setForeground(Color.BLUE); lblCartDetail.setBounds(179, 10, 54, 15); panel3.add(lblCartDetail); JButton btnBuy = new JButton("购买"); btnBuy.setBounds(441, 10, 78, 23); panel3.add(btnBuy); frame.getContentPane().add(panel3); frame.setTitle("电商购物平台-商品查询页面"); frame.setBounds(100, 100, 550, 450); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); setCenter(frame); } /** * 窗体自动居中 * * @param window */ private void setCenter(JFrame window) { Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); int width = window.getWidth(); int height = window.getHeight(); window.setBounds((d.width-width)/2, (d.height-height)/2, width, height); } public JFrame getFrame() { return frame; } public void setFrame(JFrame frame) { this.frame = frame; } public static void main(String[] args) { BookListForm bookForm = new BookListForm(); } }
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